DocumentCode
1449933
Title
Magnetic and microstructure studies of boron-enriched (Nd0.95 La0.05)11Fe76.5$ -xCo xTi2B10.5 (x=0-15) melt-spun ribbons
Author
Chang, W.C. ; Wang, S.H. ; Chang, S.J. ; Chen, Q.
Author_Institution
Dept. of Phys., Chung Cheng Univ., Ming-Hsiung, Taiwan
Volume
36
Issue
5
fYear
2000
fDate
9/1/2000 12:00:00 AM
Firstpage
3312
Lastpage
3314
Abstract
The magnetic properties and microstructures of rare earth lean and boron-rich (Nd0.95La0.05)11 Fe76.5-xCoxTi2B10.5 (x=0-15) melt-spun ribbons have been investigated. Two magnetic phases, namely α-Fe and R2Fe14B, were found, by thermal magnetic analysis (TMA), in all the ribbons studied. High intrinsic coercivity (iHc) and maximum energy product [(BH)max] values in the range of 14-18.7 kOe and 13.9-18.3 MGOe, respectively, have been achieved in these nanocomposites. Among compositions studied, the Co-substitutions, x⩽10, were found to be effective in increasing the Br and (BH)max, while keeping a high value of iHc. It was evidenced from transmission electron microscopy that the homogeneity, fine grain size, and high volume fraction of the R2Fe14B phase led to an increase in the iHc and maximum energy product of nanocomposites studied. The optimum magnetic properties of Br=9.4 kG, iHc=16.1 kOe and (BH)max=18.3 MGOe have been obtained on (Nd0.95La0.05 )11Febal.Co10Ti2B 10.5 ribbons after an optimum treatment
Keywords
boron alloys; cobalt alloys; coercive force; crystal microstructure; grain size; iron alloys; lanthanum alloys; nanostructured materials; neodymium alloys; permanent magnets; titanium alloys; transmission electron microscopy; (Nd0.95La0.05)11(FeCo)76.5 Ti2B10.5; grain size; homogeneity; intrinsic coercivity; maximum energy product; melt-spun ribbons; microstructure; nanocomposites; thermal magnetic analysis; transmission electron microscopy; volume fraction; Chromium; Cobalt alloys; Coercive force; Iron alloys; Magnetic analysis; Magnetic properties; Microstructure; Nanocomposites; Neodymium; Wheels;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.908782
Filename
908782
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